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DaniilM [7]
3 years ago
15

If you started the motor of a boat in the middle of a lake, who would detect the sound of the motor first: a friend sitting on t

he shore of the lake, or a friend snorkeling just below the surface of the water along the same shore? Explain your answer.
Physics
2 answers:
Andrei [34K]3 years ago
7 0

Answer:

A friend snorkeling just below the surface of the water along the same shore will detect the sound first.

ArbitrLikvidat [17]3 years ago
6 0

Answer:

A friend snorkeling just below the surface of the water along the same shore will detect the sound first.

Explanation:

  • The speed of sound in water medium is faster than that through the air.
  • Sound propagates through the medium by transferring through the molecules on it. Water has more closely packed molecules due to which the speed is faster.
  • In fact, the sound's speed in water is almost four times faster than that in the air.
  • So the guy in the water surface gets to hear sound faster than the one in sore.
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Answer:

Newton, absolute unit of force in the International System of Units (SI units), abbreviated N. It is defined as that force necessary to provide a mass of one kilogram with an acceleration of one metre per second per second.

4 0
3 years ago
Which would you use with a circuit to determine if a magnet was moving in close proximity to the circuit?
stealth61 [152]

Answer:

i think it would be Galvanometer

Explanation:

because it would have to be a type of coil or wire

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2 years ago
Read 2 more answers
Two 3.0 μC charges lie on the x-axis, one at the origin and the other at What is the potential (relative to infinity) due to the
Airida [17]

Complete Question:

Two 3.0µC charges lie on the x-axis, one at the origin and the other at 2.0m. A third point is located at 6.0m. What is the potential at this third point relative to infinity? (The value of k is 9.0*10^9 N.m^2/C^2)

Answer:

The potential due to these charges is 11250 V

Explanation:

Potential V is given as;

V =\frac{Kq}{r}

where;

K is coulomb's constant = 9x10⁹ N.m²/C²

r is the distance of the charge

q is the magnitude of the charge

The first charge located at the origin, is 6.0 m from the third charge; the potential at this point is:

V =\frac{9X10^9 X3X10^{-6}}{6} =4500 V

The second charge located at 2.0 m, is 4.0 m from the third charge; the potential at this point is:

V =\frac{9X10^9 X3X10^{-6}}{4} =6750 V

Total potential due to this charges  = 4500 V + 6750 V = 11250 V

6 0
3 years ago
How is the energy of the wave affected if the amplitude of the wave increases from 2 meters to 4
Alex777 [14]

Answer:

Energy of wave will increase as the energy of wave is related to the amplitude of wave

5 0
2 years ago
What is kinematics ?? xD -,- xD​
lorasvet [3.4K]

Answer:

Kinematics is a <em>subfield of physics, developed in classical mechanics, that describes the motion of points, bodies (objects), and systems of bodies (groups of objects) without considering the forces that cause them to move.</em>

Explanation:

Hope this helps!

Blazetoxic123

7 0
3 years ago
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